of the following statement about DNA polymerase of eukaryotes is NOT
true:()
A: DNA
pol α/primase are involved in initial synthesis of the nascent
strand.
B: DNA
polδ and ε are mainly responsible for the synthesis of
DNA chains.
C: Replacement
of DNA polymerase could happen during DNA synthesis process.
D: There
are five kinds of DNA pol:α、β、γ、δ
and ε in eukaryotes
举一反三
- Which of the following statement about DNA polymerase of eukaryotes is NOT true: A: DNA pol α/primase are involved in initial synthesis of the nascent strand. B: DNA polδ and ε are mainly responsible for the synthesis of DNA chains. C: Replacement of DNA polymerase could happen during DNA synthesis process. D: There are five kinds of DNA pol：α、β、γ、δ and ε in eukaryotes
- The<br/>enzyme closely related to the synthesis of RNA primer is:() A: DNA<br/>pol α; B: DNA<br/>pol γ; C: DNA<br/>pol δ; D: DNA<br/>pol I; E: DNA<br/>pol III
- The<br/>role of RNA primer during DNA replication is:() A: to<br/>guide DNA polymerase to bind with DNA template B: to<br/>provide 5’ phosphate end C: to<br/>provide attachment sites for four kinds of NTP D: inducing<br/>synthesis of RNA E: to<br/>provide 3’-OH end to initiate synthesis of new DNA
- Which<br/>of the following statements about DNA polymerase III is NOT true:() A: Deoxyribonucleotide<br/>are connected to 5’ hydroxyl of synthesized DNA by DNA pol III B: To<br/>catalyze deoxyribonucleotide connected to the primer C: Requires<br/>four kinds of 5’-dNTP D: To<br/>catalyze deoxyribonucleotide connected to 3’ terminal of RNA<br/>primer E: Pyrophosphate<br/>is one of the product
- 在原核生物DNA复制延长中起主要催化作用的酶是(<br/>) A: DNA<br/>polⅠ B: DNA<br/>polⅢ C: DNA<br/>polⅡ D: DNA连接酶 E: 引物酶
内容
- 0
Which<br/>is correct about DNA polymerase and RNA polymerase:() A: RNA<br/>polymerases use nucleoside diphosphate instead of nucleoside<br/>triphosphate for synthesis of polynucleotide chains B: RNA<br/>polymerases need primer and add nucleotides in the 5 'end of the<br/>polynucleotide chain C: DNA<br/>polymerase can add nucleotides in both ends of the polynucleotide<br/>chain D: All<br/>of the RNA polymerases and DNA polymerases can only add nucleotides<br/>in the 3’ end of the polynucleotide chain
- 1
在原核生物DNA复制延长中起主要催化作用的酶是() A: DNA<br/>polⅠ B: DNA<br/>polⅢ C: DNA<br/>polⅡ D: DNA连接酶 E: 引物酶
- 2
The<br/>actions of alkylating agents:( ) A: are<br/>cell-cycle dependent B: Cause<br/>cross-linking of DNA strands C: Inhibit<br/>DNA synthesis D: Inhibit<br/>protein synthesis
- 3
Which of the<br/>following statement about RNA polymerase in prokaryotes is<br/>correct:() A: Holoenzyme is composed of five subunits (ααββ′σ) B: Any subunit of<br/>holoenzyme cannot bind to DNA separately in vivo. C: Core enzyme<br/>consists of five subunits(ααββ′ω) D: σ factor can<br/>catalyze the synthesis of RNA E: σ factor<br/>helps RNA polymerase to recognize promoter
- 4
Which<br/>of the following are NOT true about DNA polymerase I in E.coli:() A: It<br/>can repair the gap in the single-strand DN B: It<br/>can replace DNA polymerase III to add dNTP into DNA chain when DNA<br/>template is damaged. C: It<br/>possesses activity of 3’→5’ exonuclease. D: Using<br/>dNTP as substrate. E: It<br/>possesses activity of 5’→3’ endonuclease.